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EventHandler (Oracle - Berkeley DB Java API)
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<b>Berkeley DB</b><br><font size="-1"> version 4.7.25</font></EM>
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com.sleepycat.db</FONT>
<BR>
Interface EventHandler</H2>
<DL>
<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../com/sleepycat/db/EventHandlerAdapter.html" title="class in com.sleepycat.db">EventHandlerAdapter</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public interface <B>EventHandler</B></DL>
</PRE>

<P>
An interface classs with prototype definitions of all event functions that
can be called via the Berkeley DB event callback mechanism.
<p>
A user can choose to implement the EventHandler class, and implement handlers
for all of the event types. Alternatively it is possible to extend the
EventHandlerAdapter class, and implement only those events relevant to the
specific application.
<p>
The <A HREF="../../../com/sleepycat/db/EnvironmentConfig.html#setEventHandler(com.sleepycat.db.EventHandler)"><CODE>EnvironmentConfig.setEventHandler</CODE></A> is used to provide
a mechanism for reporting event messages from the Berkeley DB library
to the application.
<p>
Berkeley DB is not re-entrant. Callback functions should not attempt
to make library calls (for example, to release locks or close open
handles). Re-entering Berkeley DB is not guaranteed to work correctly,
and the results are undefined.
<P>

<P>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/EventHandler.html#handlePanicEvent()">handlePanicEvent</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A callback function to be called when a panic event is sent from the    Berkeley DB library.</TD>
</TR>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/EventHandler.html#handleRepClientEvent()">handleRepClientEvent</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A callback function to be called when a Replication Client event is sent
    from the Berkeley DB library.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/EventHandler.html#handleRepElectedEvent()">handleRepElectedEvent</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A callback function to be called when an event is sent from the
    Berkeley DB library.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/EventHandler.html#handleRepMasterEvent()">handleRepMasterEvent</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A callback function to be called when an event is sent from the
    Berkeley DB library.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/EventHandler.html#handleRepNewMasterEvent(int)">handleRepNewMasterEvent</A></B>(int&nbsp;envId)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A callback function to be called when an event is sent from the
    Berkeley DB library.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/EventHandler.html#handleRepPermFailedEvent()">handleRepPermFailedEvent</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A callback function to be called when an event is sent from the
    Berkeley DB library.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/EventHandler.html#handleRepStartupDoneEvent()">handleRepStartupDoneEvent</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A callback function to be called when an event is sent from the
    Berkeley DB library.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/EventHandler.html#handleWriteFailedEvent(int)">handleWriteFailedEvent</A></B>(int&nbsp;errorCode)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A callback function to be called when an event is sent from the
    Berkeley DB library.</TD>
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<A NAME="handlePanicEvent()"><!-- --></A><H3>
handlePanicEvent</H3>
<PRE>
void <B>handlePanicEvent</B>()</PRE>
<DL>
<DD>A callback function to be called when a panic event is sent from the    Berkeley DB library.
    <p>    This event callback is received when an error occurs in the Berkeley DB
    library where the only solution is to shut down the application and run
    recovery. In such cases, the Berkeley DB methods will throw
    <A HREF="../../../com/sleepycat/db/RunRecoveryException.html" title="class in com.sleepycat.db"><CODE>RunRecoveryException</CODE></A> exceptions. It is often easier to simply exit
    the application when such errors occur, rather than gracefully return up
    the stack.
    <p>
    When this callback is received the database environment has failed. All
    threads of control in the database environment should exit the environment
    and recovery should be run.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="handleRepClientEvent()"><!-- --></A><H3>
handleRepClientEvent</H3>
<PRE>
void <B>handleRepClientEvent</B>()</PRE>
<DL>
<DD>A callback function to be called when a Replication Client event is sent
    from the Berkeley DB library.
    <p>
    This event callback is received when this member of a replication group is
    now a client site.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="handleRepElectedEvent()"><!-- --></A><H3>
handleRepElectedEvent</H3>
<PRE>
void <B>handleRepElectedEvent</B>()</PRE>
<DL>
<DD>A callback function to be called when an event is sent from the
    Berkeley DB library.
    <p>
    This event callback is received when this site has just won an election. An
    Application using the Base replication API should arrange for a call to
    the <A HREF="../../../com/sleepycat/db/Environment.html#startReplication(com.sleepycat.db.DatabaseEntry, boolean)"><CODE>Environment.startReplication</CODE></A> method after receiving this
    event to, reconfigure the local environment as a replication master.
    <p>
    Replication Manager applications may safely igore this event. The
    Replication Manager calls <A HREF="../../../com/sleepycat/db/Environment.html#startReplication(com.sleepycat.db.DatabaseEntry, boolean)"><CODE>Environment.startReplication</CODE></A>
    automatically on behalf of the application when appropriate (resulting in
    firing of the <A HREF="../../../com/sleepycat/db/EventHandler.html#handleRepMasterEvent()"><CODE>EventHandler.handleRepMasterEvent</CODE></A> event).
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="handleRepMasterEvent()"><!-- --></A><H3>
handleRepMasterEvent</H3>
<PRE>
void <B>handleRepMasterEvent</B>()</PRE>
<DL>
<DD>A callback function to be called when an event is sent from the
    Berkeley DB library.
    <p>
    This event callback is received when this site is now the master site of
    its replication group. It is the application's responsibility to begin
    acting as the master environment.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="handleRepNewMasterEvent(int)"><!-- --></A><H3>
handleRepNewMasterEvent</H3>
<PRE>
void <B>handleRepNewMasterEvent</B>(int&nbsp;envId)</PRE>
<DL>
<DD>A callback function to be called when an event is sent from the
    Berkeley DB library.
    <p>
    This event callback is received when the replication group of which this
    site is a member has just established a new master; the local site is not
    the new master.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>envId</CODE> - The environment ID of the new master site.</DL>
</DD>
</DL>
<HR>

<A NAME="handleRepPermFailedEvent()"><!-- --></A><H3>
handleRepPermFailedEvent</H3>
<PRE>
void <B>handleRepPermFailedEvent</B>()</PRE>
<DL>
<DD>A callback function to be called when an event is sent from the
    Berkeley DB library.
    <p>
    This event callback is received when the replication manager did not
    receive enough acknowledgements (based on the acknowledgement policy
    configured with <A HREF="../../../com/sleepycat/db/EnvironmentConfig.html#setReplicationManagerAckPolicy(com.sleepycat.db.ReplicationManagerAckPolicy)"><CODE>EnvironmentConfig.setReplicationManagerAckPolicy</CODE></A>)
    to ensure a transaction's durability within the replication group. The
    transaction will be flushed to the master's local disk storage for
    durability.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="handleRepStartupDoneEvent()"><!-- --></A><H3>
handleRepStartupDoneEvent</H3>
<PRE>
void <B>handleRepStartupDoneEvent</B>()</PRE>
<DL>
<DD>A callback function to be called when an event is sent from the
    Berkeley DB library.
    <p>
    This event callback is received when the client has completed startup
    synchronization and is now processing live log records received from the
    master.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="handleWriteFailedEvent(int)"><!-- --></A><H3>
handleWriteFailedEvent</H3>
<PRE>
void <B>handleWriteFailedEvent</B>(int&nbsp;errorCode)</PRE>
<DL>
<DD>A callback function to be called when an event is sent from the
    Berkeley DB library.
    <p>
    This event callback is received when a Berkeley DB write to stable storage
    failed.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>errorCode</CODE> - If an operating system specific error code is available for the failure it
    will be passed in the errorCode parameter.</DL>
</DD>
</DL>
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